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Dear AFNI users-
We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:
https://discuss.afni.nimh.nih.gov
Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.
The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.
Sincerely,
AFNI HQ
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Sorry, got my terminology mixed up there - you're right, it's better if I tell you what I'm trying to do.
I have two maps - each a 3D NIFTI where each voxel has a certain value and I'm trying to calculate how similar these two maps are in terms of the correlation between their voxel values (i.e. value of each voxel in map A vs value of each voxel in map B).
by
ahmedaak
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AFNI Message Board
Thanks Rick and Daniel .. So just to make sure I understood correctly, if I use -docor with -demean, I should be getting the voxelwise correlation coefficient "r", correct?
by
ahmedaak
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AFNI Message Board
Hello,
I was wondering, what exactly does 3ddot do? Specifically, I mean the -docor option (the default) - I know it's a spatial correlation, but is it something like the voxelwise Pearson's/Spearman's correlation coefficient between two images for example? Or is it just an overlap measure like the DIce coefficient (i.e. would it matter if the 2 images are "masks" with
by
ahmedaak
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AFNI Message Board